When you zoom in on the end of the sensor lead wire, where the frayed insulation is, you clearly see the bare metal thermocouple wires. And from the length of that section of lead wire (~1.5 to 2 inches), the most likely location for the actual TC was on one of the flat surfaces on the shiny steel nut. They probably laid it on one of the flats, and wrapped black tape around the circumference of that shiny nut, more or less covering the entire shiny surface.
Horace, I doubt if they would have just assumed the insulation would hold the TC against the nut; I vaguely remember reading that "...the TCs were held tightly against the outer metal surface by tape". But then, that would be one less thing for us to get frustrated about! Can't have that, now can we... -Mark -----Original Message----- From: Horace Heffner [mailto:hheff...@mtaonline.net] Sent: Sunday, October 09, 2011 5:33 PM To: vortex-l@eskimo.com Subject: Re: [Vo]:Rossi heat exchanger fitting On Oct 8, 2011, at 10:08 PM, Alan Fletcher wrote: > I think that the sensor is under the black tape near the END of the > pipe -- you can see the wire going under it -- which I estimated as > 5 cm from the center. That tape is not on the the sensor per se but on a wire leading to the sensor. The wire looks to be long enough to make it to the steel nut. Look again at http://www.redmatica.com/media/Thermo1.jpg The red arrow points to the tip of the thermocouple I think. There appears to be some frayed insulation pealed back near there. It looks like a bug. The thermocouple protrudes to the left of that. The sensor appears to have a clear tape on it, like Scotch tape, but back from the tip, and way forward from the black tape. In: http://www.redmatica.com/media/Thermo2.jpg you can see that there is enough room for the sensor to extend out over the top of the big steel nut. You might have to blow up the section next to the red arrow to see the sensor tip. I have attached a clip of the sensor tip in which you can see the nut at the bottom and the red arrow tip at the left. The stuff to the bottom of the sensor, bottom left of photo, looks like either Scotch tape or frayed insulation.
